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    APPARATUS FOR ADDITIVE MANUFACTURING OF THREE-DIMENSIONAL ARTICLES
    112.
    发明申请
    APPARATUS FOR ADDITIVE MANUFACTURING OF THREE-DIMENSIONAL ARTICLES 审中-公开

    公开(公告)号：US20180009033A1

    公开(公告)日：2018-01-11

    申请号：US15702504

    申请日：2017-09-12

    Applicant: Arcam AB

    Inventor： Mattias Fager

    IPC: B22F3/105 ,  B28B1/00 ,  B29K105/00

    CPC classification number: B22F3/1055 ,  B22F2003/1057 ,  B28B1/001 ,  B29C64/153 ,  B29C64/20 ,  B29C64/386 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

    Abstract: A method for forming at least one three-dimensional article through successive fusion of parts of a powder bed, which parts correspond to successive cross sections of the three-dimensional article, the method comprising the steps of: providing a model of the at least one three-dimensional article; applying a first powder layer on a work table; directing a first energy beam from a first energy beam source over the work table causing the first powder layer to fuse in first selected locations according to corresponding models to form a first cross section of the three-dimensional article, where the first energy beam is fusing at least a first region of a first cross section with parallel scan lines in a first direction; varying a distance between two adjacent scan lines, which are used for fusing the powder layer, as a function of a mean length of the two adjacent scan lines.

    Method for additive manufacturing
    113.
    发明授权
    Method for additive manufacturing 有权

    公开(公告)号：US09789563B2

    公开(公告)日：2017-10-17

    申请号：US14547538

    申请日：2014-11-19

    Applicant: Arcam AB

    Inventor： Isak Elfstroem ,  Calle Hellestam ,  Mattias Fager

    IPC: B23K15/00 ,  B23K15/02 ,  B23K15/10 ,  B23K26/34 ,  B23K26/08 ,  B22F3/105 ,  B29C67/00

    CPC classification number: B23K15/0086 ,  B22F3/1055 ,  B23K15/02 ,  B23K15/10 ,  B23K26/08 ,  B29C64/153 ,  B29C64/386 ,  Y02P10/295

    Abstract: The invention relates to a method for forming a three-dimensional article through successive fusion of locations of a powder bed. The method comprising: providing a model of said three-dimensional article; applying a powder layer on a work table; determining a maximum scan length of an energy beam; directing said energy beam from a first energy beam source over said work table with constant energy causing said first powder layer to fuse in first selected locations according to said model to form a first cross section of said three-dimensional article, wherein locations with a shorter scan length than said maximum scan length is provided with a time sink before and/or after said scan line so that the time period between each two adjacent scan lines is constant throughout the manufacture of said three-dimensional article.

    METHOD AND DEVICE FOR CHARACTERIZING AN ELECTRON BEAM
    114.
    发明申请
    METHOD AND DEVICE FOR CHARACTERIZING AN ELECTRON BEAM 审中-公开

    公开(公告)号：US20170294288A1

    公开(公告)日：2017-10-12

    申请号：US15630199

    申请日：2017-06-22

    Applicant: Arcam AB

    Inventor： Tomas Lock

    IPC: H01J37/304 ,  H01J37/244 ,  H01J37/30 ,  B29C67/00 ,  H01J37/09 ,  B23K15/00 ,  B33Y40/00 ,  B28B1/00 ,  G01T1/29 ,  H01J37/305

    Abstract: A device for detecting X-rays radiated out of a substrate surface, said device comprising at least one X-ray detector, a resolver grating and a modulator grating, said resolver grating with at least one opening facing towards said X-ray detector is arranged in front of said X-ray detector. Said modulator grating is provided between said resolver grating and said substrate at a predetermined distance from said resolver grating and said substrate, where said modulator grating having a plurality of openings in at least a first direction, wherein said x-rays from said surface is spatially modulated with said modulator grating and resolver grating.

    METHOD AND APPARATUS FOR FORMING A THREE-DIMENSIONAL ARTICLE
    115.
    发明申请
    METHOD AND APPARATUS FOR FORMING A THREE-DIMENSIONAL ARTICLE 审中-公开

    公开(公告)号：US20170259338A1

    公开(公告)日：2017-09-14

    申请号：US15412425

    申请日：2017-01-23

    Applicant: Arcam AB

    Inventor： Ulf Ackelid

    IPC: B22F3/105 ,  B23K15/00 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y30/00

    CPC classification number: B22F3/1055 ,  B22F2003/1056 ,  B29C64/153 ,  B29C64/205 ,  B33Y10/00 ,  B33Y30/00 ,  Y02P10/295

    Abstract: An apparatus for forming at least one three-dimensional article through successive fusion of parts of a powder bed. The apparatus comprises a powder distributor configured for evenly distributing a layer of powder on top of a build table; an energy beam configured for fusing the powder layer in selected locations corresponding to the cross section of the three-dimensional article, the powder distributor comprises an elongated rod provided movable at a predetermined distance above the powder table and with its central axis in parallel with a top surface of the powder table, and a flexible foil attached onto the elongated rod and protruding from the rod towards the powder table; and an elongated device parallel with the powder distributor and arranged onto or over the powder table outside the build table, where the elongated device is arranged for mechanically touching the flexible foil.

    ADDITIVE MANUFACTURING OF THREE-DIMENSIONAL ARTICLES
    117.
    发明申请
    ADDITIVE MANUFACTURING OF THREE-DIMENSIONAL ARTICLES 有权

    公开(公告)号：US20170173691A1

    公开(公告)日：2017-06-22

    申请号：US15450358

    申请日：2017-03-06

    Applicant: Arcam AB

    Inventor： Daniel Jonasson

    IPC: B22F3/105 ,  B33Y50/02 ,  B23K15/00 ,  B33Y10/00

    CPC classification number: B22F3/1055 ,  B23K15/0086 ,  B28B1/001 ,  B29C64/153 ,  B29C64/386 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y50/02 ,  Y02P10/295

    Abstract: Provided is a method for forming a three dimensional article comprising the steps of: providing at least one electron beam source emitting an electron beam for at least one of heating or fusing said powder material, where said electron beam source comprises a cathode, an anode, and a grid between said cathode and anode; controlling the electron beam source in at least two modes during said formation of said three dimensional article; applying a predetermined accelerator voltage between said cathode and said anode; applying a predetermined number of different grid voltages between said grid and said cathode for producing a corresponding predetermined number of electron beam currents; and at least one of creating or updating a look-up table or mathematical function during one of the at least two modes, wherein said look-up table or mathematical function defines a relationship between a desired electron beam current and an applied grid voltage.

    Powder distribution in additive manufacturing of three-dimensional articles
    119.
    发明授权
    Powder distribution in additive manufacturing of three-dimensional articles 有权
    粉末分布在三维制品的添加剂制造中

    公开(公告)号：US09505057B2

    公开(公告)日：2016-11-29

    申请号：US14252984

    申请日：2014-04-15

    Applicant: Arcam AB

    Inventor： Johan Nordkvist ,  Ulf Ackelid ,  Anders Snis

    IPC: B22F3/105 ,  B23K15/00 ,  B23K26/342 ,  B28B1/00 ,  B29C67/00 ,  B22F1/00 ,  B22F3/00 ,  B33Y10/00 ,  B33Y30/00

    CPC classification number: B22F1/0014 ,  B22F3/008 ,  B22F3/1055 ,  B22F2003/1056 ,  B22F2003/1059 ,  B23K15/0086 ,  B23K26/342 ,  B28B1/001 ,  B29C64/153 ,  Y02P10/24 ,  Y02P10/295

    Abstract: The present invention relates to a method for forming a three-dimensional article through successive fusion of parts of at least one layer of a powder bed provided on a work table. Said method comprising the steps of: providing at least a first and second powder tank, providing a first type of powder in said first powder tank having a first particle size distribution, providing a second type of powder in said second powder tank having a second particle size distribution, providing a first sub-layer of said first type of powder on said work table, providing a second sub-layer of said second type of powder on top of said first layer of said first type of powder, fusing said first and second sub-layers simultaneously with a high energy beam from a high energy beam source for forming a first cross section of said three-dimensional article.

    Abstract translation: 本发明涉及通过连续融合设置在工作台上的至少一层粉末床的部分来形成三维制品的方法。 所述方法包括以下步骤：提供至少第一和第二粉末罐，在所述第一粉末槽中提供具有第一粒度分布的第一类型的粉末，在所述第二粉末槽中提供第二类型的粉末，其具有第二颗粒 在所述工作台上提供所述第一类粉末的第一子层，在所述第一类粉末的第一层的顶部上提供所述第二类型粉末的第二子层，将所述第一和第二粉末熔化 子层与来自高能束源的高能束同时形成所述三维制品的第一横截面。

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